Journal
JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY
Volume 43, Issue 1, Pages 167-174Publisher
CHURCHILL LIVINGSTONE
DOI: 10.1016/j.jcms.2014.11.003
Keywords
Bioresorption; Superimposition; Bone graft; Facial onlay augmentation; Volume analysis
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Funding
- European Social Fund within the project Multidisciplinary Research in Biomaterials Technology of New Scientist Group [2009/0199/1DP/1.1.1.2.0/09/APIA/VIAA/090]
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Facial onlay augmentation is often performed as an ancillary procedure simultaneously with orthognathic surgery to improve facial appearance, with hydroxyapatite (HAp) and HAp-based composites often used as the materials of choice. The ability to apply HAp in a granular rather than solid shape form may be responsible for its comparatively reduced rate of complications. However, a known complication of HAp and HAp composites is reduction of implant volume over time associated with resorption of the material. Evaluation of the volumetric changes of implanted biphasic calcium phosphate (HAp/beta-TCP)/collagen composite in the malar areas from baseline to 4 months, 9-12 months, and 18-24 months after surgery using cone beam computed tomography (CBCT) surface superimposition and volumetric subtraction was done. The average decrease of volume of implanted HAp/beta-TCP 4 months after surgery was 18.6%. Further volumetric decreases were negligible and a mean total volume loss of 21.65% was found at 18-24 months postoperatively. (C) 2014 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.
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